Northern lights in Forssa, Finland

Forssa is at 58° magnetic latitude, short of the auroral oval: the aurora shows low in the northern sky on active nights, and overhead only in storms.

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Right now · as of

It is twilight in Forssa, so only a bright aurora would show; it is fully dark at 18:13.

NOAA’s model gives under 5% overhead right now. It looks only 30 minutes ahead, so check again once it is dark.

NOAA SWPC’s OVATION nowcast for . It ignores cloud and moonlight.

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Forssa and the auroral oval

  • Forssa is at 57.6° magnetic latitude (IGRF-14 at 2026.8). The aurora circles the magnetic poles, so this says more about how often it is seen here than the latitude on a map does.
  • By a rough rule of thumb, the aurora reaches this far when the Kp index is 5 or more.

Good to know

  • NOAA’s model ignores cloud and moonlight: a high chance under cloud means nothing to see.
  • It looks about 30 minutes ahead, so it says nothing about later tonight.
  • Dark here means the sun at least 12° below the horizon; in twilight only a bright aurora shows.

How the layers work, where their data comes from and what they can’t tell you: Aurora forecast, Live clouds, Day and night, live

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